BRR Examples - TL 9000

Basic Return Rate (BRR) Examples
7.2 BRR Examples
7.2.1 Basic Calculation
Example 7.2-1
Each month the reporting organization reports the Basic Return Rate measure
for the month based on the returns received during the month that were originally
shipped in the BRR basis period and the field population of units shipped in the
BRR basis period. The BRR basis period is eighteen months. Therefore the
returns count would include any unit shipped during the report month or the prior
eighteen months. The field population would be the total number of units
shipped in the eighteen months prior to the report month. It can be noted that
BRR is equivalent to the combination of the ERI and YRR measures. BRR is
used for products where tracking long term reliability is not practical.
As an example, suppose during January 2013 there were a total of 355 returns
received out of a total population of 186,914 units. Of the 355 returns, 316 were
shipped during the month or the prior eighteen months. In other words, 316 of the
returned units were shipped on or after July 1, 2011. For purposes of this
example, let us set the number of units shipped in the previous eighteen months
at 156,914 and a total number of shipments at 186,914. In tabular form the data
for the month is:
Table 7.2-1 BRR Data
BRR Total
Returns 316 355
Population 156,914 186,914
The resulting BRR calculation for the month is:
Basic
Returns from units shipped Jul-11 through Jan-13
Return = 100 x 12 x ——————————————————————
Rate
Total shipments for Jul-11 through Dec-12
= 100 x 12 x FRrb / FRsb
= 100 x 12 x 316 / 156914
= 2.42%
Note: All returned units which fall into the basis shipping period and meet the TL
9000 definition of a return are to be counted. Whether the unit is in or out of
warranty does not have any bearing on the determination.
The following shows this example in detail.
Version 1.0 Copyright 2012 QuEST Forum
BRR Examples
7.2-1